Magnetic communication in acyclic mixed-valence trimolybdenum complexes mediated by redox switching

Abstract

Reversible one-electron reduction converts the ‘V-shaped’ [Mo(NO)[HB(dmpz)₃]{OC₆H₄XpyMo(NO)[HB(dmpz)₃]- Cl}₂] (dmpz = 3,5-dimethylpyrazolyl; X = nothing, CHCH or CH₂CH₂; py = pyridyl) with two unpaired electrons on the peripheral metals, whose magnetic exchange properties depend on X, into a monoanion having three unpaired paired spins on each metal centre which engage in magnetic exchange in solution irrespective of X.